Core Size-Dependent Proton Conductivity of Silica Filler-Functionalized Polymer Electrolyte Membrane

Tomohiro Nohara, Kazuki Koseki, Keisuke Tabata, Ryuichiro Shimada, Yukina Suzuki, Kazuki Umemoto, Masaki Takeda, Ryota Sato, Sasiphapa Rodbuntum, Toshihiko Arita, Akito Masuhara

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Polymer electrolyte fuel cells (PEFC) are expected as next energy generation systems, and their performance is strongly dependent upon the polymer electrolyte membrane (PEM). We have suggested a new model of PEM with a three-dimensional proton conduction passways structure using the filler method, particularly focused on the functionalization of filler particles. The polymer surface-functionalized silica nanoparticles (NPs) with three different particle sizes were prepared by the reversible addition-fragmentation chain transfer polymerization with particles (RAFT PwP) method that we developed. Silica NPs coated with an in situ polymerized block copolymer consisted of a proton conductive polymer and a protective polymer. We confirmed that the proton conductivity increased and the activation energy decreased as the core particle size became smaller because of enlarging the total interface area between each particle and increasing the proton conduction passways.

Original languageEnglish
Pages (from-to)14674-14678
Number of pages5
JournalACS Sustainable Chemistry and Engineering
Issue number39
Publication statusPublished - 2020 Oct 5
Externally publishedYes


  • Core-shell type hybridized nanoparticles
  • Polymer coating method
  • Polymer electrolyte fuel cell
  • Proton conductive polymer
  • RAFT polymerization

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment


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